Amends the Military Code of Illinois. Requires the Governor to organize and maintain within this State, on a reserve basis, a volunteer civilian cybersecurity auxiliary force, known as the Illinois Cyber Auxiliary Force (ICAF), that is capable of being expanded and trained to educate and protect from cyber incidents State, county, and local government entities and critical infrastructure, including election systems, businesses, and the citizens of this State. Provides that in the case of an emergency proclaimed by the Governor, or caused by illicit actors or imminent danger, the Governor, as Commander-in-Chief, shall expand the ICAF as the exigency of the occasion requires. Provides that the ICAF shall be operated as an interagency effort between the Illinois Department of Military Affairs (IDMA), the Illinois Emergency Management Agency and Office of Homeland Security (IEMA-OHS), and the Illinois Department of Innovation and Technology (DoIT). Provides that IEMA-OHS shall have oversight of the entire program and act as the lead agency for the ICAF for mission and project development; DoIT shall evaluate threats and recommend missions to the Homeland Security Advisor; and IDMA shall focus on recruiting, manning, and mission assignments. Provides that the Adjutant General, in cooperation with the Homeland Security Advisor, shall request activation of ICAF for cyber incident response; and that IDMA shall stock and issue uniform articles as required. Contains provisions concerning training for ICAF members; funds appropriated by the General Assembly for the actual and necessary expenses incurred by the ICAF for administration, training, and deployment; and the adoption of rules by IEMA-OHS that are consistent with the provisions of law governing the membership, organization, administration, equipment, and maintenance of the ICAF. Provides that ICAF members may not be called or ordered into the military service. Provides that no person shall be accepted into the ICAF who is not a United States national or a lawful permanent resident. Contains provisions concerning background checks on applicants; the removal or resignation of ICAF members; and other matters.